计量內校员必须分清的三个概念:校准-检定-期间核查
校准、检定、期间核查:同一台仪器,三张“体检单”
一把卡尺的“体检”,背后是三套完全不同的规则。
“你们的仪器校准了吗?”
“检定了。”
“那期间核查呢?”
“……”。
这是审核现场最常见的“三连问”。三个词天天挂在嘴上,但很多人一到现场就露馅:把检定当校准,把期间核查当“再校准一次”。
术语用混,轻则体系审核开个不符合项;重则——属于强制检定的设备没检定就投入使用,这不是扣分问题,是违法问题。
这篇文章不绕弯子,只讲三件事:它们各自是什么、根本差异在哪、以后拿到设备怎么判断。
01 先讲人话:它是什么,不是什么
校准(Calibration)——管“准不准”
人话:在规定条件下,用更准的标准去“量”你的仪器,找出它到底偏了多少。
按 JJF 1001-2011 的定义:在规定条件下的一组操作,第一步确定由测量标准提供的量值与相应示值之间的关系,第二步用此信息确定由示值获得测量结果的关系——两边都要考虑测量不确定度。
它不是:不判“合格/不合格”,只给数据、修正值和不确定度。
它解决:这台设备准不准、差多少。
检定(Verification)——管“合不合法”
人话:查明并确认计量器具是否符合法定要求的活动,包括检查、加标记和/或出具检定证书(JJF 1001-2011)。
它不是:不是企业自己说了算的活动,是法制行为。
它解决:这台设备能不能合法使用。
期间核查(Intermediate Check)——管“稳不稳”
人话:两次校准/检定之间,按规定程序验证设备的功能或计量特性有没有“走样”(CNAS-GL042:2019)。
它不是:不是重新校准,不溯源、不给修正值、不判合格。
它解决:上一次校准的状态,到今天还靠不靠得住。
一句金句先记住:校准管“准”,检定管“法”,期间核查管“稳”。
02 一张表看懂:根本差异
放大镜看“准”,证书看“法”,循环箭头看“稳”。
维度 | 校准 | 检定 | 期间核查 |
|---|---|---|---|
本质 | 量值溯源行为 | 法制计量行为 | 内部质量监控行为 |
依据 | 校准规范(JJF)/方法文件 | 国家计量检定规程(JJG) | 自编核查程序/作业指导书 |
是否强制 | 组织自定(自愿溯源) | 强制检定目录内法定强制 | 按必要性和有效性自定 |
执行方 | 有能力的校准机构(如 CNAS 认可) | 法定计量检定机构 | 本单位/使用部门 |
结果 | 校准证书:数据+不确定度,不判合格 | 检定证书/通知书,判合格与否,有法定效力 | 核查记录:状态保持或异常 |
周期 | 组织依使用情况自定 | 法定周期(定点定期) | 两次校准/检定之间按计划 |
出问题 | 超差→调整、维修后重校 | 不合格→不得使用 | 异常→提前校准或停用 |
看完这张表,三者的“分工”其实很清晰:检定是“法律说了算”,校准是“数据说了算”,期间核查是“你自己盯着”。
03 一个场景串起来:一把卡尺的“一生”
在一家制造企业里,同一把数显卡尺,可能同时经历三种活动:
如果它用于贸易结算等法定场景 → 强制检定,凭检定证书上岗,无证不得使用(《计量法》第九条);
如果它用于内部质量控制 → 每年做一次校准,拿到偏差数据和不确定度;
两次校准之间 → 每月用一块经校准的标准量块核查一次,画成控制图,盯住漂移趋势。
这其实是人类的老传统。从秦始皇“车同轨、书同文、统一度量衡”,到今天实验室里的量值溯源,对“准”的执念从来没变过。变的只是分工:谁来定标准、谁来查、多久查一次。
再打个比方:校准是请医生做全面体检,期间核查是每天自己量体温。体检单不能天天出,但体温不能不量。
04 四个常见误区,先排掉
误区一:“我们检定了,不用再校准。”
有一定道理——检定也能保证量值可靠。但它解释不了一件事:强制检定目录之外的仪器,根本没有法定检定义务,靠什么溯源?靠校准。目录内的走检定,目录外的走校准,两者不能互相替代。
误区二:“期间核查就是再校准一次。”
有一定道理——都是检查设备状态。但期间核查不溯源、不给修正值、不判合格,它只回答一个问题:校准状态有没有保持。核查发现问题,可以提前校准;但核查本身,永远替代不了校准。
误区三:“校准证书有有效期,到期就作废。”
校准证书本身不规定有效期;校准周期由实验室根据使用频率、稳定性、风险自己定。真正有法定周期、到期必须重做的,是检定。
误区四:“所有设备都要做期间核查。”
不是。按“必要性和有效性”原则(CNAS-CL01-A025),重点盯这几类:稳定性差的、使用频繁的、参数关键的、环境敏感的、对结果影响大的设备。
05 以后怎么判断:三问框架
以后拿到任何一台测量设备,问三个问题就够了:
它在强制检定目录内吗(贸易结算、安全防护、医疗卫生、环境监测)?→ 在:走检定,无证不得使用。
它需要量值溯源吗?→ 需要:走校准,要校准证书和数据。
它关键、易漂移、用得勤吗?→ 是:制定期间核查计划,两次校准之间定期查。
一句话带走:法定的检定,自愿的校准,日常的期间核查。
下次审核员再问,先别慌。先分清“法、准、稳”三件事,再决定递上哪张“体检单”。
如果这篇文章帮你少开一个不符合项,转发给实验室的同事吧——顺便问问他们:你们的期间核查方案,真的白纸黑字写下来了吗?
内容验真
核心术语定义:
校准定义:JJF 1001-2011《通用计量术语及定义》——“校准”条目(规定条件下的一组操作,确定由测量标准提供的量值与相应示值之间的关系,并用此信息确定由示值获得测量结果的关系,两边均带测量不确定度)。
检定定义:JJF 1001-2011——“检定(计量检定)”条目:查明和确认测量仪器符合法定要求的活动,包括检查、加标记和/或出具检定证书。
期间核查定义:CNAS-GL042:2019《测量设备期间核查的方法指南》3.3:设备在使用过程中或在相邻两次校准之间,按照规定程序验证其功能或计量特性能否持续满足方法要求或规定要求而进行的操作。
法规依据:
《中华人民共和国计量法》第九条:社会公用计量标准器具、部门和企业事业单位使用的最高计量标准器具,以及用于贸易结算、安全防护、医疗卫生、环境监测方面列入强制检定目录的工作计量器具,实行强制检定;未按规定申请检定或检定不合格的,不得使用。
CNAS-CL01-A025 对期间核查的文件化要求:应制定期间核查文件,明确范围、方法、人员、结果分析、判定和处理方式;怀疑校准状态异常时应提前校准。
ISO/IEC 17025:2017 要求实验室按程序对设备进行期间核查,保持校准状态的可信度。
图片来源:头图、文中概念图、封面图共 3 张均为 AI 生成图片(示意性质,非实拍或官方文件扫描件)。
事实边界:各标准条文以正式发布文本为准;校准周期、核查频次等属于组织自行规定的管理决策,本文仅给出通行做法,不构成法定要求。
控制图,盯住漂移趋势。"}}},"type":"bullet","parent_id":"NHZwdjzlHoGfeNxrNl4cXu9qngd","comments":[],"locked":false,"author":"7587467054702136275"}},"doxcnERx0DV8cJmGNxohFYtSWVh":{"id":"doxcnERx0DV8cJmGNxohFYtSWVh","snapshot":{"type":"text","revisions":[],"author":"7587467054702136275","text":{"apool":{"nextNum":1,"numToAttrib":{"0":["author","7587467054702136275"]}},"initialAttributedTexts":{"attribs":{"0":"*0+28"},"text":{"0":"这其实是人类的老传统。从秦始皇“车同轨、书同文、统一度量衡”,到今天实验室里的量值溯源,对“准”的执念从来没变过。变的只是分工:谁来定标准、谁来查、多久查一次。"}}},"align":"left","parent_id":"NHZwdjzlHoGfeNxrNl4cXu9qngd","comments":[],"locked":false,"hidden":false,"children":[]}},"doxcnBOyM0shIXByV1w7P3mrIub":{"id":"doxcnBOyM0shIXByV1w7P3mrIub","snapshot":{"background_color":"rgb(240,244,255)","border_color":"rgb(130,167,252)","align":"left","author":"7587467054702136275","comments":[],"hidden":false,"emoji_value":"1f4a1","parent_id":"NHZwdjzlHoGfeNxrNl4cXu9qngd","emoji_id":"bulb","revisions":[],"locked":false,"children":["doxcn2LoOU5Gz2QLXwepsmW4xJd"],"text_color":"","type":"callout"}},"doxcn2LoOU5Gz2QLXwepsmW4xJd":{"id":"doxcn2LoOU5Gz2QLXwepsmW4xJd","snapshot":{"revisions":[],"author":"7587467054702136275","align":"left","hidden":false,"children":[],"text":{"apool":{"nextNum":1,"numToAttrib":{"0":["author","7587467054702136275"]}},"initialAttributedTexts":{"attribs":{"0":"*0+1c"},"text":{"0":"再打个比方:校准是请医生做全面体检,期间核查是每天自己量体温。体检单不能天天出,但体温不能不量。"}}},"type":"text","parent_id":"doxcnBOyM0shIXByV1w7P3mrIub","comments":[],"locked":false}},"doxcnkxqltNfUoCUbHDmPl6ws3c":{"id":"doxcnkxqltNfUoCUbHDmPl6ws3c","snapshot":{"type":"heading2","parent_id":"NHZwdjzlHoGfeNxrNl4cXu9qngd","locked":false,"hidden":false,"align":"left","comments":[],"revisions":[],"author":"7587467054702136275","children":[],"text":{"apool":{"numToAttrib":{"0":["author","7587467054702136275"]},"nextNum":1},"initialAttributedTexts":{"attribs":{"0":"*0+d"},"text":{"0":"04 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